Summary: Phytologia (December 2008) 90(3) 255
JUNIPERUS OF CANADA AND THE UNITED STATES:
TAXONOMY, KEY AND DISTRIBUTION
Robert P. Adams
Biology Department, Baylor University, Box 727
Gruver, TX 79040, USA
The taxonomy of Juniperus of Canada and the United States is
reviewed and keys to the taxa are presented as well as distribution
maps. Phytologia 90(3): 255-314 (December, 2008).
KEY WORDS: Juniperus, Cupressaceae, taxonomy, keys, distribution,
Canada, United States.
The genus Juniperus consists of approximately 70 species and
27 varieties (Adams, 2008). All the taxa grow in the northern
hemisphere, except J. procera Hochst. ex Endl. which grows along the
rift mountains in east Africa, thence into the southern hemisphere
(Adams, Demeke and Abulfatih 1993), and some of the Mediterranean
Juniperus species such as J. oxycedrus L., J. phoenicea L., and J.
thurifera L. that grow in the mountains of the northernmost part of